Computation of (G/T)¶

Computation of (G/T):¶

From the expression of the link budget, we get:

$(\frac{G}{T})_{dB}=(\frac{E_{b}}{N0})_{dB}-10\cdot log_{10}(EIRP\cdot (\frac{\lambda}{4\cdot \pi\cdot R})^{2}\cdot\frac{1}{k\cdot R_{b}\cdot L_{marg}})$

With Lmarg the only unknown which has to be evaluated in order to compute (G/T).

An accurate evaluation of the margin can be tricky and is not the aim of this project. Then we just roughly evaluated it:

• Depointing of the antennas: Ldep= 3dB + 3dB=6 dB
• Non-ideal demodulator: Ldem= 3 dB
• Atmosphere attenuation (clear sky conditions): Lprop= 1.5 dB
• Interferences: Lint= 1.5 dB

Then, we took Lmarg= 12 dB. However, the value of the margin can easily be modified for the simulations presented in "Simulations and results" if needed.